package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.conditions.update.LambdaUpdateChainWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.EmployeeMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.EmployeeService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {


    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;
    /**
     * 根据id删除分类,删除之前需要进行判断是否关联其他套餐
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> lqwDish =new LambdaQueryWrapper<>();
        //添加查询条件
        lqwDish.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(lqwDish);
        //查看当前分类是否关联其它菜品,有就抛出异常
        if(dishCount>0){
            //已经关联餐品,抛出异常
            throw new CustomException("当前分类项关联了菜品,不能删除");
        }

        LambdaQueryWrapper<Setmeal> lqwSetmeal =new LambdaQueryWrapper<>();
        lqwSetmeal.eq(Setmeal::getCategoryId,id);
        int setmealCount = setmealService.count(lqwSetmeal);
        //查看当前分类是否关联其它套餐,有就抛出异常
        if(setmealCount>0){
            //已经关联餐品,抛出异常
            throw new CustomException("当前分类项关联了套餐,不能删除");
        }
        //删除分类
        super.removeById(id);

    }
}
